FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term adult midgut ID (Ontology) FBbt:00003138 (Fly Anatomy)
Definition The middle region of the adult alimentary canal, the epithelium of which is lined with peritrophic membrane rather than chitinous intima as for the foregut and hindgut. The radius along the midgut is not uniform, with 6 major constrictions delimiting 6 regions (R0-R5). The anterior midgut (R1-R2) functions in absorption, the posterior (R4-R5) plays a role in reabsorption, and the middle acidic region (R3), which contains the copper cells (adult cuprophilic cell), in secretion and absorption.[ FlyBase:FBrf0007735 FlyBase:FBrf0208023 FlyBase:FBrf0221749 ]
Also Known As "adult ventriculus"
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Direct annotations: records annotated with this exact term (child terms are NOT included)
Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 adult midgut (all annotations which use CV term, excluding "NOT" statements)
     adult midgut | adult stage
      --       --       --
     adult midgut | cell non-autonomous | somatic clone
      --       --       --       --
     adult midgut | chemical conditional
      --       --       --
     adult midgut | conditional
      --       --
     adult midgut | female limited
      --       --       --
     adult midgut | heat sensitive
      --       --       --
     adult midgut | male
      --       --       --
     adult midgut | mated female
      --       --       --
     adult midgut | nutrition conditional
      --       --       --       --
     adult midgut | pharate adult stage
      --       --       --       --
     adult midgut | progressive
      --       --       --       --
     adult midgut | somatic clone
      --       --
     adult midgut | somatic clone | conditional
      --       --       --
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multi-tissue structure
 |__midgut______________
gut                     |
 |__adult gut___________|
gut section             |
 |__midgut______________|
adult alimentary canal  |
 |__adult gut___________|
                        adult midgut  1812 rec.
                         |__adult midgut constriction
                         |   |__adult midgut constriction R0-R1
                         |   |__adult midgut constriction R1-R2
                         |   |__adult midgut constriction R2-R3
                         |   |__adult midgut constriction R3-R4(+)
                         |   |__adult midgut constriction R4-R5
                         |__adult midgut epithelium 1276 rec.
                         |   |__adult anterior midgut epithelium(+) 42 rec.
                         |   |__adult differentiating enterocyte 6 rec.
                         |   |__adult midgut epithelial cell(+) 340 rec.
                         |   |__adult posterior midgut epithelium(+) 440 rec.
                         |   |__adult proventriculus epithelial zone 4(+)
                         |   |__adult proventriculus outer layer(+)
                         |   |__enteroblast(+) 267 rec.
                         |   |__intestinal stem cell(+) 659 rec.
                         |__adult midgut muscle cell 30 rec.
                         |   |__adult midgut circular muscle cell 8 rec.
                         |   |__adult midgut longitudinal muscle cell 4 rec.
                         |__adult midgut region 319 rec.
                         |   |__adult anterior midgut(+) 134 rec.
                         |   |__adult midgut region R0
                         |   |__adult midgut region R1(+) 6 rec.
                         |   |__adult midgut region R1a
                         |   |__adult midgut region R1b
                         |   |__adult midgut region R2(+) 18 rec.
                         |   |__adult midgut region R2a
                         |   |__adult midgut region R2b
                         |   |__adult midgut region R2c
                         |   |__adult midgut region R3(+) 89 rec.
                         |   |__adult midgut region R3a 4 rec.
                         |   |__adult midgut region R3ab(+) 32 rec.
                         |   |__adult midgut region R3b 4 rec.
                         |   |__adult midgut region R3c(+) 7 rec.
                         |   |__adult midgut region R4(+) 9 rec.
                         |   |__adult midgut region R4a
                         |   |__adult midgut region R4b
                         |   |__adult midgut region R4c
                         |   |__adult midgut region R5(+) 37 rec.
                         |   |__adult midgut region R5a
                         |   |__adult midgut region R5b
                         |   |__adult posterior midgut(+) 171 rec.
                         |__adult peritrophic membrane 26 rec.
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Is a midgut
Develops from midgut imaginal island
Part of adult gut
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